Unlike other evil team leaders like Giovanni, Cyrus & Ghesis i would have a little trick up my sleeve the player would never expect, lots and lots of Full Restores & Max Revives :P
And then it is revealed that the hero trainer has this ability: http://www.youtube.com/watch?v=chsl6EID50Y
On topic, my Poison Gym Leader team fits.
Drapion(Toxic Spiker and Psychic type counter. Armed with signature Cross Poison, Crunch and Ice Fang) Crobat (Fast attacker with Cross Poison, Bite and Confuse Ray) Tentacruel (Ground counter with Surf, backup Toxic Spiker, Toxic and Poison Jabs) Weezing (Tough defense + Explosion. Also uses Shadow Ball, Assurance and Toxic) Gengar (Fast Special Attack with Venoshock and Shadow Balls. Hypno/Dream Eater combo for supplemet) Nidoking(Powerful attacker with EQ, TBolt and Break Brick. Poison Jab for STAB)
Action speaks louder than words. But words, when used right, overwhelm any action - Me, 2006 Let's put a smile on that face - The Joker, 2008